Commercial Loans Receivables and Allowance for Loan Loss (Narrative) (Details) - USD ($)	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Apr. 01, 2017
Receivables [Abstract]
Allowance for loan losses	$ 180,000	$ 42,000	$ 210,000
Due days for loans accounted for on a non-accrual basis and accruing loans with principal payments past	90 days or more
Due days for loans on nonaccrual status when interest is past due and remains unpaid	90 days or more
Percentage of principal balance of the commercial loans receivables	excess of 10% of the principal balance of commercial loans receivable